I really like the concept and the way it works. My main concern however is that you are obviously not using the latest Facebook SDK, and I am wondering and curious how it is going to affect your product in a few months and what strategy you are going to adopt next. None the less great job! Cheers!

This has enormous upside potential.
Think about tracking a matchmaker's success ratio. I can see people asking friends with high success ratios to set them up.
This is also a portal to pseudo-online-dating for people who would otherwise not participate in it.